Malicious PDF — malware analysis report

Static analysis result for SHA-256 201fd6dcfc0d0237…

MALICIOUS

PDF

81.8 KB Created: 2021-09-12 05:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c60dac044345d45155b31c49d6638b32 SHA-1: 2d65027329affca8a9542f667b2d69635a76141f SHA-256: 201fd6dcfc0d02378cea185d29d3f9fce26518d9a4faab800d770ab68dddedfe
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript, suggesting it's designed to execute malicious code. It also features a large number of external URIs, many of which point to disposable domains, indicating a link farm likely used for phishing or distributing further payloads. The presence of embedded JavaScript and external links strongly suggests an attack pattern involving user interaction to trigger malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://arab-hams.com/Ups/files/nuruzevozufemulufowuxuto.pdf In PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/lagisipodafedun.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/26972947141.pdfIn PDF document text
    • http://espokebar.com/uploads/files/71588746707.pdfIn PDF document text
    • https://theipbuzz.com/images/file/42708166453.pdfIn PDF document text
    • https://ubranni.com/uploader/files/23744534367.pdfIn PDF document text
    • http://gomsuhoangminh.com/app/webroot/uploads/files/bobaxaniritaxuxewanaru.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/linizezelesosidofinojasog.pdfIn PDF document text
    • https://servauto.fr/img/user/file/veveruxugerika.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/18595443042.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/mewozuwomomebagabebaga.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://barbusci.it/maisUserFile/file/kijatawux.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/mozojebikul.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8e0a333b4---16241045413.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/83281121734.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fdf6b3a4e---fogepofivokinusonopas.pdfIn PDF document text
    • http://teen.plovdivweek.com/js/ckfinder/userfiles/files/zuzolagomaju.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/80696354774.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/vuvamemij.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/vawojuburiridufovobaj.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/luteraruxow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=android+calendar+to+google+calendarPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 10360 bytes
SHA-256: 1b354f4814b84c707b8b36ebda2e0eff3ae8669ac42533dae4eb7b984e347f0b
font_01_sfnt_off0000f249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF249 17892 bytes
SHA-256: c938d6a18b9f510f7332a3d79dcabe0308332a9c94fc5a7b1d0ed4ac61930f8f
font_02_sfnt_off00012156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12156 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1